Conveyer.



D. T. WILLiAMS. GONVBYER.

APPLICATION FILED JUNE 10, 1913.

1,099,956, Patented June 16,1914.

2 SHEETS SHEET1.

I -J WITNESSES l INVENTORJ D. T. WILLIAMS.

OONVEYEB.

APPLIIOATION'IILED JUNE 10, 1913.

Patented June 16,1914.

2 SHEETS-SHEET 2.

WITNESSES ATTORNEY.

UNITED strn'r s i rnnr OFFICE.

DAVID T. WILLIAMS, OF PATERSON, NEIV JERSEY, ASSIGNOR .".[0 STANDARD STOKER CO. INC, 015 WILMINGTON, DELAWARE, A CORPORATION OF DELAWARE.

CONVEYER.

' Specification of Letters Iatent.

Patented J unc. 16, 1914..

Application filed June 10, 1913. Serial Ito-772,760.

To a]? whom it may concern,-

Be it known that I, DAVID T. WILLIAMS, a subject of the King of England, residing at Paterson, in the county of Passaic'and State of New Jersey, have invented certain new and useful Improvements in Conveyors, of which the following is a specification.

This invention relates to conveying means,

for instance, such as are employed in mecoaxial and rotating with it a driven gear member which is annular in form and'ot-herwise adapted to allow unimpeded progress of the material therethrough,and in order to prevent particles of the material being-ad vanced from having access to the driving tread of said gear member or in any other way getting between it and the driving gear member. with the consequence of wearing or injuring them or clogging their action, said driven gear member has its driving tread in a. novel manner housed in the adjoining ends of sections of said structure and sealed off from the passage thereof. Furthermore, a part of the screw has an increased pitch for purposes appertaining to the uniform advance of the material through said structure.

In the accompanying drawings, in which, simply by way of example, I have illustrated my invention in connection with the convey ing means of a mechanical stoker equipment between a locomotive and its tender, Figure 1 is a longitudinal sectional view of suchv conveying means constructed in accordance with the present invention; Fig. 2 shows its trough a and a driving gear member in elevation, looking towardthe left in Fig. 1, the other moving parts being omitted; Fig. 3 shows the trough section a, the screw 76' and driven gear member in end elevation, looking toward the left in Fig. 1; Fig. 4 is .gether.

a vertical sectionalview of the bowl-end portion of the'troug-h a; Figs. 5 and (i are sectional views of the element including a part of the screw and the driven gear member; Fig. 7 is a sectional detail View illustrating the seal-forming means; and, Fig. 8 is a fragmentary elevation of the sealing ring.

The troughs a and 6 shown in Fig. 1 are I suitably formed and fitted together at c to tween them a cross-sectionally T-shaped continuous groove 6, and each has also an annu-lar groove f opening toward the other section, the two grooves f beingopposi'te. The section a is provided with a to wall, part of which may be integral therewith and part removable, as shownin F ig hto allow access to the interior of the trough"; and it has depending from thelintegratpart' of its top wall a suitable bearing bracket g. At the top and on the inside of sections a, which is generally part-spherical in form and open at the top, are the opposite grooved supports it receiving the tongued portions of a bearing bracket 7 depending therefrom.

In the brackets' and 9 is journaled the shaft or axis portion of a spiral feed screw in, the major part of whose blade appears integral with the shaft 'or axis as herein illustrated. The remaining portion of the blade, designated 7; in the drawings, is a separable part thereof formed around a hub Z which is splined on the shaftand, together with a single screw-blade-shaped spoke m, carries an annular peripherally toothed driven gear member 77, whose interior diameter is at least as great as that of the trough. As shown, the hub, spoke m, part is of the screw and member a are inte gra-l in the present instance. In cross-sec tion, Figs; 5 to 7, the perimeter-portion of this' gear is T-sha-ped, and it is housed within the T- shaped groove e of the sections a a. As illustrated, shaft j has a suitable (Z and pro-- Together these sections form bevcoal to the screw 7: in the usual way.

The sections a a are formed with an opening 9 entering from the exterior into the groove 6 and thus exposing a limited portion of the toothed periphery of gear member a; this opening is at the under side of trough a in the present instance, and it receivesa driving gear member 9", .which meshes with gear member a and may be driven in any manner '(not shown). Thus,

the power being transmitted to the screw through an annular gear membern which is coaxial and rotative therewith and receives the driving force exteriorly of the passage of the trough and which is further so formed and related to said passage as not to impede the progress of the coal-or interfere with the advancing influence of the screw .thereonth'e surface thereof exposed to the coal being relatively limited and therefore having substantially negligible infiuence-itselfto rotateor turn the body of coala considerable increase in efliciency over known constructions is obtained. The part is of the screw has asomewhat greater pitch than the remainder so as to give as much freeway between the convolutions of the screw blade as would exist if the spoke m were not present and to compensate for any tendency toward retardation in the advance of tlie'coal due principally to an in terruption in the propellingnieans being produced where the coupling 0 occurs, 1

The sealing ofi' of the driving tread of the gear member 11, from the passage of the trough, whereby to prevent particles of coal or the like from being caught between the driving and driven members'r and n, may be accomplished by the following means: Rings 8 are fitted in the grooves f, bearing against the opposite faces of the gear a and preferably seating'in shallow grooves if therein, being held in contact with the gear by the system of springs 'u'housed in the rings'and held against rotation by the studs '0 entering notches a: (Fig. 8) in the grooves f.

I do not wish to be limited to the precise construction shown and described herein, what I claim being:

1. The combination of an advancing means including a rotary screw and an open driven gear member coaxial therewith, a passaged structure housing the rotary structure and including two sections meeting end to end, anda driving gear member arranged exteri'orly of the passaged structure and havingperipheral driving contact with the driven gear member, the adjoinin ends of said sections housing approximatgy all of the periphery of the driven gear member excepting that receiving the contact of the driving gear member, substantially as de scribed.

- 2. The combination of an advancing means including a rotary screw and an open driven gear member coaxial'therewith, a passaged structure housing the rotary structure and including two sections meeting end to end, a driving gear member arranged exteriorly of the passaged structure and having peripheral driving contact with the driven gear member, the adjoining ends of said sections housing approximately all of the periphery of the driven gear member excepting that receiving the contact of the driving gear member, and means to seal off the periphery of said driven gear member from the passage of the passaged structure, substantially as described.

3. In combination, with a passaged structure, means to advance the material therethrough including a rotary screw having its axis extending longitudinally of the-passageof saidstructure and an open driven gear membersurrounding said screw and having an inwardly projecting spoke, said sorew having an increased pitch where it penetrates said member, substantially as described.

a. In combination, with a passaged structure, means to advance the material therethrough including a rotary screw having 1ts axis extending longitudinally of the passage of said structure and including two spaced screw portions, the end of one screw portion which adjoins the space between said screw portions having a relatively increased pitch, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

DAVID T. WILLIAMS.

Witnesses 7M; D. BELL, ELsm KAUFMANN. 

